Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King: "Some ARM fixes, the biggest of which is the fix for the signal return codes; this came up due to an interaction between the V7M nommu changes and the BE8 changes. Dave Martin spotted that the kexec trampoline wasn't being correctly copied (in a way which allows Thumb-2 to work). I've also fixed a number of breakages on footbridge platforms as I've upgraded one of my machines to v3.12... one which had a 1200 day uptime" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 7907/1: lib: delay-loop: Add align directive to fix BogoMIPS calculation ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S ARM: footbridge: fix EBSA285 LEDs ARM: footbridge: fix VGA initialisation ARM: fix booting low-vectors machines ARM: dma-mapping: check DMA mask against available memory
This commit is contained in:
Linus Torvalds
commit
1d07489aac
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@ -61,7 +61,7 @@ extern void __pgd_error(const char *file, int line, pgd_t);
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* mapping to be mapped at. This is particularly important for
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* non-high vector CPUs.
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*/
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#define FIRST_USER_ADDRESS PAGE_SIZE
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#define FIRST_USER_ADDRESS (PAGE_SIZE * 2)
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/*
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* Use TASK_SIZE as the ceiling argument for free_pgtables() and
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@ -14,11 +14,12 @@
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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#include <asm/cacheflush.h>
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#include <asm/fncpy.h>
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#include <asm/mach-types.h>
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#include <asm/smp_plat.h>
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#include <asm/system_misc.h>
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extern const unsigned char relocate_new_kernel[];
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extern void relocate_new_kernel(void);
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extern const unsigned int relocate_new_kernel_size;
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extern unsigned long kexec_start_address;
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@ -142,6 +143,8 @@ void machine_kexec(struct kimage *image)
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{
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unsigned long page_list;
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unsigned long reboot_code_buffer_phys;
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unsigned long reboot_entry = (unsigned long)relocate_new_kernel;
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unsigned long reboot_entry_phys;
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void *reboot_code_buffer;
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/*
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@ -168,16 +171,16 @@ void machine_kexec(struct kimage *image)
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/* copy our kernel relocation code to the control code page */
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memcpy(reboot_code_buffer,
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relocate_new_kernel, relocate_new_kernel_size);
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reboot_entry = fncpy(reboot_code_buffer,
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reboot_entry,
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relocate_new_kernel_size);
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reboot_entry_phys = (unsigned long)reboot_entry +
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(reboot_code_buffer_phys - (unsigned long)reboot_code_buffer);
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flush_icache_range((unsigned long) reboot_code_buffer,
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(unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
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printk(KERN_INFO "Bye!\n");
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if (kexec_reinit)
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kexec_reinit();
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soft_restart(reboot_code_buffer_phys);
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soft_restart(reboot_entry_phys);
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}
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@ -2,10 +2,12 @@
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* relocate_kernel.S - put the kernel image in place to boot
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*/
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#include <linux/linkage.h>
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#include <asm/kexec.h>
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.globl relocate_new_kernel
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relocate_new_kernel:
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.align 3 /* not needed for this code, but keeps fncpy() happy */
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ENTRY(relocate_new_kernel)
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ldr r0,kexec_indirection_page
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ldr r1,kexec_start_address
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@ -79,6 +81,8 @@ kexec_mach_type:
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kexec_boot_atags:
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.long 0x0
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ENDPROC(relocate_new_kernel)
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relocate_new_kernel_end:
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.globl relocate_new_kernel_size
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@ -30,6 +30,27 @@
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* snippets.
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*/
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/*
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* In CPU_THUMBONLY case kernel arm opcodes are not allowed.
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* Note in this case codes skips those instructions but it uses .org
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* directive to keep correct layout of sigreturn_codes array.
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*/
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#ifndef CONFIG_CPU_THUMBONLY
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#define ARM_OK(code...) code
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#else
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#define ARM_OK(code...)
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#endif
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.macro arm_slot n
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.org sigreturn_codes + 12 * (\n)
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ARM_OK( .arm )
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.endm
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.macro thumb_slot n
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.org sigreturn_codes + 12 * (\n) + 8
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.thumb
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.endm
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#if __LINUX_ARM_ARCH__ <= 4
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/*
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* Note we manually set minimally required arch that supports
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@ -45,26 +66,27 @@
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.global sigreturn_codes
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.type sigreturn_codes, #object
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.arm
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.align
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sigreturn_codes:
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/* ARM sigreturn syscall code snippet */
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mov r7, #(__NR_sigreturn - __NR_SYSCALL_BASE)
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swi #(__NR_sigreturn)|(__NR_OABI_SYSCALL_BASE)
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arm_slot 0
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ARM_OK( mov r7, #(__NR_sigreturn - __NR_SYSCALL_BASE) )
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ARM_OK( swi #(__NR_sigreturn)|(__NR_OABI_SYSCALL_BASE) )
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/* Thumb sigreturn syscall code snippet */
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.thumb
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thumb_slot 0
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movs r7, #(__NR_sigreturn - __NR_SYSCALL_BASE)
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swi #0
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/* ARM sigreturn_rt syscall code snippet */
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.arm
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mov r7, #(__NR_rt_sigreturn - __NR_SYSCALL_BASE)
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swi #(__NR_rt_sigreturn)|(__NR_OABI_SYSCALL_BASE)
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arm_slot 1
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ARM_OK( mov r7, #(__NR_rt_sigreturn - __NR_SYSCALL_BASE) )
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ARM_OK( swi #(__NR_rt_sigreturn)|(__NR_OABI_SYSCALL_BASE) )
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/* Thumb sigreturn_rt syscall code snippet */
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.thumb
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thumb_slot 1
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movs r7, #(__NR_rt_sigreturn - __NR_SYSCALL_BASE)
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swi #0
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@ -74,7 +96,7 @@ sigreturn_codes:
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* it is thumb case or not, so we need additional
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* word after real last entry.
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*/
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.arm
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arm_slot 2
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.space 4
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.size sigreturn_codes, . - sigreturn_codes
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@ -40,6 +40,7 @@ ENTRY(__loop_const_udelay) @ 0 <= r0 <= 0x7fffff06
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/*
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* loops = r0 * HZ * loops_per_jiffy / 1000000
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*/
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.align 3
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@ Delay routine
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ENTRY(__loop_delay)
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@ -15,6 +15,7 @@
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <video/vga.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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@ -196,6 +197,8 @@ void __init footbridge_map_io(void)
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iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
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pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
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}
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vga_base = PCIMEM_BASE;
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}
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void footbridge_restart(enum reboot_mode mode, const char *cmd)
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@ -18,7 +18,6 @@
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <video/vga.h>
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#include <asm/irq.h>
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#include <asm/mach/pci.h>
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@ -291,7 +290,6 @@ void __init dc21285_preinit(void)
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int cfn_mode;
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pcibios_min_mem = 0x81000000;
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vga_base = PCIMEM_BASE;
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mem_size = (unsigned int)high_memory - PAGE_OFFSET;
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for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
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@ -30,21 +30,24 @@ static const struct {
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const char *name;
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const char *trigger;
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} ebsa285_leds[] = {
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{ "ebsa285:amber", "heartbeat", },
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{ "ebsa285:green", "cpu0", },
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{ "ebsa285:amber", "cpu0", },
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{ "ebsa285:green", "heartbeat", },
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{ "ebsa285:red",},
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};
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static unsigned char hw_led_state;
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static void ebsa285_led_set(struct led_classdev *cdev,
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enum led_brightness b)
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{
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struct ebsa285_led *led = container_of(cdev,
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struct ebsa285_led, cdev);
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if (b != LED_OFF)
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*XBUS_LEDS |= led->mask;
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if (b == LED_OFF)
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hw_led_state |= led->mask;
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else
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*XBUS_LEDS &= ~led->mask;
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hw_led_state &= ~led->mask;
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*XBUS_LEDS = hw_led_state;
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}
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static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
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@ -52,18 +55,19 @@ static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
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struct ebsa285_led *led = container_of(cdev,
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struct ebsa285_led, cdev);
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return (*XBUS_LEDS & led->mask) ? LED_FULL : LED_OFF;
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return hw_led_state & led->mask ? LED_OFF : LED_FULL;
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}
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static int __init ebsa285_leds_init(void)
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{
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int i;
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if (machine_is_ebsa285())
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if (!machine_is_ebsa285())
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return -ENODEV;
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/* 3 LEDS All ON */
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*XBUS_LEDS |= XBUS_LED_AMBER | XBUS_LED_GREEN | XBUS_LED_RED;
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/* 3 LEDS all off */
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hw_led_state = XBUS_LED_AMBER | XBUS_LED_GREEN | XBUS_LED_RED;
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*XBUS_LEDS = hw_led_state;
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for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
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struct ebsa285_led *led;
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@ -9,6 +9,7 @@
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*
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* DMA uncached mapping support.
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*/
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#include <linux/bootmem.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/gfp.h>
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@ -162,6 +163,8 @@ static u64 get_coherent_dma_mask(struct device *dev)
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u64 mask = (u64)DMA_BIT_MASK(32);
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if (dev) {
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unsigned long max_dma_pfn;
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mask = dev->coherent_dma_mask;
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/*
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@ -173,6 +176,8 @@ static u64 get_coherent_dma_mask(struct device *dev)
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return 0;
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}
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max_dma_pfn = min(max_pfn, arm_dma_pfn_limit);
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/*
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* If the mask allows for more memory than we can address,
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* and we actually have that much memory, then fail the
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@ -180,7 +185,7 @@ static u64 get_coherent_dma_mask(struct device *dev)
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*/
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if (sizeof(mask) != sizeof(dma_addr_t) &&
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mask > (dma_addr_t)~0 &&
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dma_to_pfn(dev, ~0) > arm_dma_pfn_limit) {
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dma_to_pfn(dev, ~0) > max_dma_pfn) {
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dev_warn(dev, "Coherent DMA mask %#llx is larger than dma_addr_t allows\n",
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mask);
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dev_warn(dev, "Driver did not use or check the return value from dma_set_coherent_mask()?\n");
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@ -192,7 +197,7 @@ static u64 get_coherent_dma_mask(struct device *dev)
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* fits within the allowable addresses which we can
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* allocate.
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*/
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if (dma_to_pfn(dev, mask) < arm_dma_pfn_limit) {
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if (dma_to_pfn(dev, mask) < max_dma_pfn) {
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dev_warn(dev, "Coherent DMA mask %#llx (pfn %#lx-%#lx) covers a smaller range of system memory than the DMA zone pfn 0x0-%#lx\n",
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mask,
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dma_to_pfn(dev, 0), dma_to_pfn(dev, mask) + 1,
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@ -146,7 +146,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
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info.flags = VM_UNMAPPED_AREA_TOPDOWN;
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info.length = len;
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info.low_limit = PAGE_SIZE;
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info.low_limit = FIRST_USER_ADDRESS;
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info.high_limit = mm->mmap_base;
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info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
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info.align_offset = pgoff << PAGE_SHIFT;
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@ -87,7 +87,8 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
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init_pud = pud_offset(init_pgd, 0);
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init_pmd = pmd_offset(init_pud, 0);
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init_pte = pte_offset_map(init_pmd, 0);
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set_pte_ext(new_pte, *init_pte, 0);
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set_pte_ext(new_pte + 0, init_pte[0], 0);
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set_pte_ext(new_pte + 1, init_pte[1], 0);
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pte_unmap(init_pte);
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pte_unmap(new_pte);
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}
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